The Donghe Sandstone is the most important exploration and production strata in Tarim BasinBy exploration and research for many years, it becomes known that the Donghe Sandstone is transgression basal sandstone which was deposited during the Late Devonian to Early Carboniferous while sea level risingIt is obvious that the sandstone is a diachronic sedimentary body, which belongs to the same sedimentary facies but was not deposited at the same timeThe Donghe Sandstone mainly consists of terrigenous clastic rocks in shore and shelf marine environments, and partly consists of terrigenous clastic rocks in transitional environmentsAccording to integrated analysis on lithology, texture and other facies indications ofmore than 100 wells in the basin, the shore, estuary, braided fluvial delta andalluvial fan facies have been recognizedThe highenergy shore facies is the most important facies and is distributed extensivelyThe highenergy clastic shore and shelf sediments were deposited in early to middle sedimentary period of theDonghe SandstoneThe carbonate platform was deposited in late period when transgression reached a maximum, but there is still mixture shore and clastic shore in Lunnan and North areas,which were affected by provenancesThe Donghe Sandstone was deposited with thinning in ramp slope, with thickening in steep slope, and with thinningor outwedgingin the isolated islandsThese features provide a good geologic basis for the formation of nonstructural traps in the Donghe SandstoneIt is hopeful to find oil reservoirs(oilfields)in Manjaer, Lunnan, Tazhong, Mazatag and Caohu areasIn conclusion,there are better prospects in the exploration of nonstructural traps in the Donghe Sandstone